1 files changed, 16 insertions, 0 deletions
diff --git a/bits.h b/bits.h
new file mode 100644
index 0000000..8374527
--- /dev/null
+++ b/bits.h
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
+ *
+ * This file is part of nios2sim-ng.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _BITS_H_
+#define _BITS_H_
+
+#define BIT_MASK(n)	(((n) == 64) ? ~0ULL : ((1ULL << (n))-1))
+
+#endif /* _BITS_H_ */